Dave Jones wrote:

Can you explain this a little further? I'm fairly certain
there are places in the kernel already doing this (or similar).
In fact, I cut-n-pasted most of the above from similar code in the
powernow-k8 driver.  What exactly can we deadlock on?


I wanted to change the MSR driver to do the above, and Alan Cox objected that with realtime priority routines and/or user set affinity, that code might never be executed, so I retained the IPI-based code (which executes at the target processor at interrupt priority.)

        -hpa
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